#define _CRT_SECURE_NO_WARNINGS 1
#include<Stdio.h>
#include<stdbool.h>

struct TreeNode {
    int val;
    struct TreeNode* left;
    struct TreeNode* right;
};

bool isSameTree(struct TreeNode* p, struct TreeNode* q)
{
    if (p == NULL && q == NULL)
        return true;
    if ((p != NULL && q == NULL)
        || (p == NULL && q != NULL))
        return false;
    if (p->val != q->val)
        return false;
    return isSameTree(p->left, q->left)
        && isSameTree(p->right, q->right);
}